John Berenyi wrote:
If I were you, I'd keep them both. Otherwise, it's a coin toss.


I hear ya. Its almost like you have to keep both...its that hard of a
decision. One thing some people don't know unless they have the SE-3 and
used it; the R7A's passband tuning works with the Sherwood SE-3 Synch
Detector. It does not work with the 515. This is all due to the design
limitations of the 515.

This is one of the beautiful things about the R7(a) and SE-3 combo that
has to be experienced to be appreciated. That alone should make your
decision for you.
Keep the Drake.
Never heard a 515, but the audio on the R7 sure isn't anything special.
Probably the only flaw in the whole rig.
Just out of curiosity, what filter bandwidths do you have in the Drake?